Hi Marcus: Thank you so much.
1.How did the system know how many items I can consume in a work call? 2.Do you means that every times call the block,the block will throw the ninput_items[0] items? For example,the input steam 0 item is 1,2,3,4,5... and the ninput_items[0]=2. The first time call the block, 1 2 is removed. The second time call the block,3 4 is removed.Is my understanding right?Just to confirm it. 3.I add two files before and after "Stream CRC 32" block respectively.Namely file1.dat and file2.dat.The type is "Byte".Can I use the read_char_binary.m in matlab to look at the data?Or use other m file provided by the gnuradio?Thank you. Best regards, zswx At 2015-07-09 21:48:30, "Marcus Müller" <marcus.muel...@ettus.com> wrote: Hi Zswx, ninput_items[0] is really the number of items that you can consume in a work call (on input stream 0). It's usually > 1. Best regards, Marcus On 07/09/2015 03:29 PM, zs wrote: Hi, Thank you in advance.I have a question about the "ninput_items".I find the meaning of it is "vector of items available on all input buffers". When I read the source code of "crc32_bb_impl.cc",I see the code below, " int 65 crc32_bb_impl::work (int noutput_items, 66 gr_vector_int &ninput_items, 67 gr_vector_const_void_star &input_items, 68 gr_vector_void_star &output_items) 69 { 70 const unsigned char *in = (const unsigned char *) input_items[0]; 71 unsigned char *out = (unsigned char *) output_items[0]; 72 long packet_length = ninput_items[0]; " I think the ninput_items[0]=1,because the item input is 1 every times.But when I write the code "std::cout<<ninput_items[0]<<std::endl;",It display the packet_length.I think the ninput_items[0]=1 no matter what pack_length is.Why I'm wrong? Thank you. Best regards, zswx _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.orghttps://lists.gnu.org/mailman/listinfo/discuss-gnuradio
_______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio